Thyroxine is known as T4 simply because it consists of 4 iodine atoms

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Thyroxine is known as T4 simply because it consists of 4 iodine atoms
Thyroxine is called T4 because it contains four iodine atoms

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are shortened references to two extremely essential hormones that are created by the thyroid gland to control the body's metabolic process. If you have a thyroid condition, you might have noticed T3 and T4 scratched in your doctor's notes or on the lab sheet you present when you get your blood drawn. You may want to consider a nearer appear at what these hormones are and why they are essential